Another update on what is slow progress.
I've cut and shut MY11 WRX headers to fit up.
Now sitting next to stock headers and 86Drift race headers.
Now for some disappointing news. With the stock exhaust you can't hear the burble at idle. You can hear it when revving, but it's not earth shattering cool.
I'm going to install it with my 86Drift track pipe and try and get a decent video. I can't do driving videos as there aren't any O2 bungs and too much restriction in some of the pipes.